Nearby theorems
|
|
Metamath Proof Explorer |
< Previous
Next >
Nearby theorems |
|
| Mirrors > Home > MPE Home > Th. List > df-doma | Structured version Visualization version Unicode version | ||
| Description: Definition of the domain extractor for an arrow. (Contributed by FL, 24-Oct-2007.) (Revised by Mario Carneiro, 11-Jan-2017.) |
| Ref | Expression |
|---|---|
| df-doma |
        |
| Step | Hyp | Ref | Expression |
|---|---|---|---|
| 1 | cdoma 16670 |
. 2
 | |
| 2 | c1st 7166 |
. . 3
| |
| 3 | 2, 2 | ccom 5118 |
. 2
|
| 4 | 1, 3 | wceq 1483 |
1
 |
| Colors of variables: wff setvar class |
| This definition is referenced by: homadm 16690 dmaf 16699 |
| Copyright terms: Public domain | W3C validator |